The computer program spip is aimed at solving the Generalized Non-Linear Schrödinger equation (GNLSE), involved in optics e.g. in the modelling of light-wave propagation in an optical fibre, by the Interaction Picture method, a new efficient alternative method to the Symmetric Split-Step method.
The electromagnetic-wave model of light accounts naturally for the origin of energy transport.
Two competing models of light, as a collection of fast-moving particles and as a propagating wave, were advanced.
It has also proposed increases that the White House expects to raise the standard to 24 miles a gallon for 2011 models of light trucks.
Known collectively today as geometrical optics, the rules constitute an extremely useful, though very approximate, model of light.
The rules of geometrical optics, developed through centuries of observation, can be derived from the classical electromagnetic-wave model of light.
Because of his immense authority in the scientific community, there were few challenges to his particle model of light in the century after his death in 1727.
As will be seen in the following sections, this scientific conflict between particle and wave models of light permeates the history of the subject.
The Government is shifting to a model of "light touch regulation", where homes will largely assess themselves by filling in "paper reviews" – essentially a series of forms.
